Sorry if I'm dragging the thread back to the earlier questions, but I suspect there could be some tie between the lack of information on hobbit graveyards and the manner of the usual hobbit deaths. I agree with much that has been said earlier in this thread about the typical hobbit's lack of preoccupation with death, and I think the manner in which the typical hobbit died likely would play a role in that attitude.
Hobbits die of old age, and rarely of accidents. In a few very specific cases they die in battle or are lost away from the Shire (was Isengar Took ever heard from again?). But largely hobbits get old and die. There is no mention of chronic illness, or of the deaths of young children due to injury or disease. In fact, the only young hobbits to die non-battle related deaths I can think of were Drogo and Primula Baggins. There is no mention, even in passing, of plagues, childhood diseases like measles, wasting diseases, birth defects, even the kind of domestic or workplace injuries that result in disabilities. In all of recorded hobbit history there are no amputees or cripples (although Lalia Clayhanger was said to have been too fat to walk
) or invalids of any kind. Even most of the old hobbits seem pretty spry. Gaffer Gamgee, The Old Took, even Otho and Lobelia Sackville-Baggins enjoy very good health to the ends of their long lives.
What does this have to do with lack of preoccupation with death? The very stability of the pattern ("grow old gracefully and die of old age") makes death more a part of nature and less a fate to be avoided at all costs. Among Elves (who see death somewhat rarely, but always tragically) and Men (who see death frequently, and often tragically) death is something to be put off as long as possible, but always with the knowledge that it could come tomorrow. We see many tragic deaths in LoTR and the Silmarillion, many of these "innocent deaths": Miriel Serinde wastes away from grief, Nienor commits suicide and her sister Lalaith dies in childhood from a plague. Finduilas (Faelivrin) is slain by orcs, and her Gondorian namesake wastes away, Elured and Elurin were kidnapped and lost in early childhood. In light of this frequency of early death, survival becomes a goal in itself and life something to cling to at all costs. Without the threat, in a community such as the Shire, survival is barely a concern.
To use an analogy: people who have never experienced hunger rarely think about how long they will have food. They expect it, as a right. Similarly, hobbits who rarely experience tragedy
expect longevity. They have no need to consider the lengths of their lives because longevity is nearly as plentiful in the Shire as comfort, pipeweed, and ale.
Child- this might tie in with your "childlike nature" of hobbits. Children rarely think about death either. But I haven't thought much about this yet.
Just a few thoughts.
Sophia